# FlagAttribute

<a id="flagattribute"></a>

# FlagAttribute

```cpp
#include <icy/stun/attributes.h>

class FlagAttribute
```

[Defined in src/stun/include/icy/stun/attributes.h:348](https://github.com/auscaster/icey/blob/main/src/stun/include/icy/stun/attributes.h#L348)

> **Inherits:** [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute)

Implements a zero-length STUN/TURN flag attribute (presence implies the flag is set).

## List of all members

| Name | Kind | Owner |
|------|------|-------|
| [`FlagAttribute`](#flagattribute-1) | `function` | Declared here |
| [`clone`](#clone-14) | `function` | Declared here |
| [`read`](#read-9) | `function` | Declared here |
| [`write`](#write-38) | `function` | Declared here |
| [`Size`](#size-13) | `variable` | Declared here |
| [`~Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute-1) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`clone`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#clone-12) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`read`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#read-7) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`write`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#write-36) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`type`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#type-17) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`size`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#size-12) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`paddingBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddingbytes) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`paddedBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddedbytes) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`consumePadding`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#consumepadding) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`writePadding`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#writepadding) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`typeString`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#typestring) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`TypeID`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#typeid) | `variable` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`create`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#create-10) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`paddingBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddingbytes-1) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`paddedBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddedbytes-1) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`typeString`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#typestring-1) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`_type`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#_type-1) | `variable` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`_size`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#_size-3) | `variable` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute-2) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`setLength`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#setlength) | `function` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |
| [`Type`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#type-18) | `enum` | Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) |

## Inherited from [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute)

| Kind | Name | Description |
|------|------|-------------|
| `function` | [`~Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute-1) `virtual` `inline` |  |
| `function` | [`clone`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#clone-12) `virtual` | Returns a deep copy of this attribute. |
| `function` | [`read`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#read-7) `virtual` | Reads the body (not the type or size) for this type of attribute from the given buffer. |
| `function` | [`write`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#write-36) `virtual` `const` | Writes the body (not the type or size) to the given buffer. |
| `function` | [`type`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#type-17) `const` |  |
| `function` | [`size`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#size-12) `const` |  |
| `function` | [`paddingBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddingbytes) `const` `inline` |  |
| `function` | [`paddedBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddedbytes) `const` `inline` |  |
| `function` | [`consumePadding`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#consumepadding) `const` | Advances the reader past any 4-byte alignment padding that follows this attribute's body. |
| `function` | [`writePadding`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#writepadding) `const` | Writes zero-fill padding bytes to align this attribute to a 4-byte boundary. |
| `function` | [`typeString`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#typestring)  |  |
| `variable` | [`TypeID`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#typeid) `static` `constexpr` |  |
| `function` | [`create`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#create-10) `static` | Creates an attribute of the given wire type and body size. Returns nullptr if the type is unknown or the size is invalid. |
| `function` | [`paddingBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddingbytes-1) `static` `inline` `constexpr` | Returns the 4-byte alignment padding required for a body of `size` bytes. |
| `function` | [`paddedBytes`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#paddedbytes-1) `static` `inline` `constexpr` | Returns the body length including 4-byte alignment padding. |
| `function` | [`typeString`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#typestring-1) `static` |  |
| `variable` | [`_type`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#_type-1)  |  |
| `variable` | [`_size`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#_size-3)  |  |
| `function` | [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute-2)  |  |
| `function` | [`setLength`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#setlength)  | Updates the stored body length. |
| `enum` | [`Type`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#type-18)  |  |

## Public Methods

| Return | Name | Description |
|--------|------|-------------|
|  | [`FlagAttribute`](#flagattribute-1)  |  |
| std::unique_ptr< [`Attribute`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#attribute) > | [`clone`](#clone-14) `virtual` `override` | Returns a deep copy of this attribute. |
| `void` | [`read`](#read-9) `virtual` `inline` `override` | No-op: flag attributes carry no body bytes. |
| `void` | [`write`](#write-38) `virtual` `const` `inline` `override` | No-op: flag attributes carry no body bytes. |

---

<a id="flagattribute-1"></a>

### FlagAttribute

```cpp
FlagAttribute(uint16_t type)
```

[Defined in src/stun/include/icy/stun/attributes.h:352](https://github.com/auscaster/icey/blob/main/src/stun/include/icy/stun/attributes.h#L352)

#### Parameters

| Parameter | Type | Description |
|-----------|------|-------------|
| `type` | `uint16_t` | Wire type code for the concrete attribute. |

---

<a id="clone-14"></a>

### clone

`virtual` `override`

```cpp
virtual std::unique_ptr< Attribute > clone() override
```

[Defined in src/stun/include/icy/stun/attributes.h:355](https://github.com/auscaster/icey/blob/main/src/stun/include/icy/stun/attributes.h#L355)

Returns a deep copy of this attribute.

#### Reimplements

- [`Attribute::clone`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#clone-12)

---

<a id="read-9"></a>

### read

`virtual` `inline` `override`

```cpp
virtual inline void read(BitReader &) override
```

[Defined in src/stun/include/icy/stun/attributes.h:360](https://github.com/auscaster/icey/blob/main/src/stun/include/icy/stun/attributes.h#L360)

No-op: flag attributes carry no body bytes.

#### Reimplements

- [`Attribute::read`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#read-7)

---

<a id="write-38"></a>

### write

`virtual` `const` `inline` `override`

```cpp
virtual inline void write(BitWriter &) const override
```

[Defined in src/stun/include/icy/stun/attributes.h:363](https://github.com/auscaster/icey/blob/main/src/stun/include/icy/stun/attributes.h#L363)

No-op: flag attributes carry no body bytes.

#### Reimplements

- [`Attribute::write`](https://auscaster.com/icey/docs/api-reference/icy-stun-Attribute.md#write-36)

## Public Static Attributes

| Return | Name | Description |
|--------|------|-------------|
| `constexpr uint16_t` | [`Size`](#size-13) `static` `constexpr` |  |

---

<a id="size-13"></a>

### Size

`static` `constexpr`

```cpp
constexpr uint16_t Size = 0
```

[Defined in src/stun/include/icy/stun/attributes.h:357](https://github.com/auscaster/icey/blob/main/src/stun/include/icy/stun/attributes.h#L357)